Display device for presentation

ABSTRACT

In a display apparatus for presentation including an image display device  30  that allows for moving a selection marker across a plurality of menu items arranged in vertical and horizontal directions and displayed on a screen  1  in accordance with received angular velocity information, a menu item to which the selection marker should be moved is determined in accordance with the number of cycles of angular velocity sampling during which the move distance of the pointing device obtained for every sampling cycle from the angular velocity information exceeds a predetermined value continuously. This improved the inconvenience to use with a conventional pointing device in which a distance by which an object should be moved on the display screen is proportional to the entire distance over which the pointing device was moved, calculated from angular velocity; thus, the operator has to tilt the remote controller incorporating a gyroscope to a large extent to move the object by a long distance on the screen.

TECHNICAL FIELD

The present invention relates to a display apparatus for presentationconfigured with a pointing device consisting of a remote controllerincorporating a gyroscope (hereinafter referred to as a Gyro remotecontroller) and a projection type image display device such as a liquidcrystal projector.

BACKGROUND ART

Recently, pointing devices have increasingly been used for effectivepresentation in conjunction with displaying compute-based images andanimation images with a projection type image display device such as aliquid crystal projector, and a pointing device using a Gyro remotecontroller has been proposed. The device using the Gyro remotecontroller samples relative position information for two points betweenwhich the pointing device was moved per given period of time, as thedevice is moved in a direction, and transmits the relative positioninformation to a display device. Based on the relative positioninformation received, the display device can perform moving theselection from one menu item to another in a main menu on its screen,moving a cursor or pointer, panning an image, or picture-in-picturemoving.

DISCLOSURE OF THE INVENTION

However, a conventional pointing device consisting of the Gyro remotecontroller works in such a manner that, for instance, when selecting amenu item, the selection is moved to the menu item only after the entiredistance over which the pointing device was moved, obtained fromreceived data, exceeds a predefined value. Therefore, the operator hasto move the Gyro remote controller to a large extent in order to move anobject by a long distance on the screen and may feel inconvenience touse. As countermeasures, it is conceivable to increase sensitivity.However, increasing sensitivity gives rise to a problem of difficulty incontrol of a minor move, because the sensed move distance becomesexcessively great even by moving the pointing device by a smalldistance. When increasing or decreasing a value or moving the pointer onthe display with the pointing device, such value change or move isperformed at a constant rate in the conventional manner. If the amountof change or the distance of move is great, the operator has to operatethe pointing device for a long time, which posed a problem of pooruser-friendliness.

To solve the above problems, the present invention provides a displayapparatus for presentation comprising a pointing device equipped withmeans for detecting angular velocities in horizontal and verticaldirections and means for transmitting detected angular velocityinformation and an image display device having means for receivingangular velocity information transmitted from the pointing device andequipped with a function of moving a selection marker across a pluralityof menu items arranged in vertical and horizontal directions anddisplayed on a screen in accordance with the received angular velocityinformation, characterized by provision of means for determining a menuitem to which the selection marker should be moved in accordance withthe number of cycles of sampling the angular velocities during which themove distance of the pointing device obtained for every sampling cyclefrom the angular velocity information exceeds a predetermined valuecontinuously.

Also, the present invention provides a display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with afunction of presenting an indicator for value setting in a menu itemdisplayed on a screen and making the indicator slide in a valueincremental or decremental direction in accordance with the receivedangular velocity information, characterized by provision of means fordetermining the amount of increment or decrement of the indicator forvalue setting in accordance with the number of cycles of sampling theangular velocities during which the move distance of the pointing deviceobtained for every sampling cycle from the angular velocity informationexceeds a predetermined value continuously.

Also, the present invention provides a display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with apanning function of moving an image displayed on a screen in accordancewith the received angular velocity information, characterized byprovision of means for panning by a distance in accordance with thenumber of cycles of sampling the angular velocities during which themove distance of the pointing device obtained for every sampling cyclefrom the angular velocity information exceeds a predetermined valuecontinuously.

Also, the present invention provides a display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with apicture-in-picture function to move or enlarge a sub-screen displayed ona screen in accordance with the received angular velocity information,characterized by moving or enlarging the sub-screen by a distance inaccordance with the number of cycles of sampling the angular velocitiesduring which the move distance of the pointing device obtained for everysampling cycle from the angular velocity information exceeds apredetermined value continuously.

Also, the present invention provides a display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with afunction of presenting an indicator for value setting in a menu itemdisplayed on a screen and making the indicator slide in a valueincremental or decremental direction in accordance with the receivedangular velocity information, characterized by provision of means forchanging the rate of increment or decrement of the indicator for valuesetting in accordance with the number of cycles of sampling the angularvelocities during which the move distance of the pointing deviceobtained for every sampling cycle from the angular velocity informationexceeds a predetermined value continuously.

Also, the present invention provides a display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with afunction of moving a cursor or pointer displayed on a screen inaccordance with the received angular velocity information, characterizedby provision of means for moving the cursor or pointer by a distance inaccordance with the number of cycles of sampling the angular velocitiesduring which the move distance of the pointing device obtained for everysampling cycle from the angular velocity information exceeds apredetermined value continuously.

Also, the present invention provides a display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with afunction of moving a pointer displayed on a screen in accordance withthe received angular velocity information, characterized by provision ofmeans for changing the rate at which the pointer moves in accordancewith the number of cycles of sampling the angular velocities duringwhich the move distance of the pointing device obtained for everysampling cycle from the angular velocity information exceeds apredetermined value continuously.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing a configuration of a display apparatusof the present invention.

FIG. 2 shows an on-screen display example according to the presentinvention in a first embodiment.

FIG. 3 shows an on-screen display example according to the presentinvention in a second embodiment.

FIG. 4 shows an on-screen display example according to the presentinvention in a third embodiment.

FIG. 5 shows an on-screen display example according to the presentinvention in a fourth embodiment.

FIG. 6 shows an on-screen display example according to the presentinvention in a fifth embodiment.

FIG. 7 is a graph showing a relationship between the number of cycles ofsampling and the rate at which the value increases in FIG. 3.

FIG. 8 shows an on-screen display example according to the presentinvention in a sixth embodiment.

FIG. 9 is a graph showing a relationship between the number of cycles ofsampling and the rate at which the pointer moves in FIG. 8.

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described hereinafter inconjunction with the drawings.

FIG. 1 is a block diagram showing a configuration of a display apparatusfor presentation according to the present invention. In the diagram,reference numeral 1 denotes a screen. Reference numeral 20 denotes apointing device that is made up of buttons 21 such as a reset button, anangular velocity detecting means 22, a data transmitting means 23, and asystem microcomputer 24 of the pointing device. Reference numeral 30denotes an image display device that is made up of a data receivingmeans 31, a display means 32, and a system microcomputer 33 of the imagedisplay device. Here, the angular velocity detecting means 22 consistsof a gyroscope and converts three-dimensional information into twodimensional-information in horizontal and vertical directions, and reads(samples) relative position information for two points between which thepointing device was moved per given period of time and detects therelative positions of the two points. The detected relative positioninformation is wirelessly transmitted from the data transmitting means23 to the data receiving means 31. The display apparatus forpresentation is constituted by the above elements. A computer-basedimage not shown is projected on the screen 1 from the image displaydevice 30 and the image can be displayed and manipulated in various wayswith the pointing device 20.

FIG. 2 shows a display example on the screen 1 according to the presentinvention in a first embodiment. On the screen 1, an array of menu itemsarranged in both vertical and horizontal directions may be displayed inan initial screen or the like. On this screen, a selected menu item maybe changed in color or brightness or highlighted. Using the pointingdevice 20, the operator can move the selection marker from an initiallyselected top left menu item in the vertical or horizontal direction andeventually select an objective menu item. Specifically, when theoperator moves the pointing device 20, the angular velocity detectingmeans 22 samples relative position information for two points betweenwhich the pointing device was moved per given period of time from thehorizontal and vertical angular velocities and detects the relativepositions of the two points, and the data transmitting means 23transmits the relative position information to the data receiving means31 of the image display device 30. Then, the system microcomputer 33 ofthe image display device 30 that received the relative positioninformation calculates the distance of the move by integration of thatinformation. Then, a menu item to which the selection marker should bemoved is determined in accordance with the number of cycles of samplingduring which the move distance of the pointing device obtained for everysampling cycle exceeds a predetermined value continuously.

For example, in a state where a menu item 11 is initially selected onthe screen 1 shown in FIG. 2, when the pointing device 20 is movedhorizontally, sampling of angular velocity values of the moving pointingdevice is performed at intervals of 10 msec. If the horizontal movedistance of the pointing device exceeds a fixed value for fivesuccessive cycles of sampling, the marker is moved to a menu item 21. Ifthis continues for further five successive cycles of sampling (a totalof 10 cycles), the marker is moved to a menu item 31. If this continuesfor further five successive cycles of sampling (a total of 15 cycles),the marker is moved to a menu item 41.

Likewise, when the pointing device 20 is moved vertically, according tothe number of successive cycles (duration) of sampling during which themove distance of the pointing device calculated for every sampling cycleexceeds a predetermined value, the selection marker will be moved to amenu item 12, menu item 13, etc. In this example, a menu item to whichthe marker should be moved is determined in proportion to the number ofcycles of sampling (time) during which the pointing device continues tobe moved, not subject to the entire distance over which the pointingdevice 20 was moved. Thus, the operator is allowed to move the pointingdevice slowly, taking longer, in order to move across multiple menuitems. In consequence, the operator does not need to move the pointingdevice 20 to a large extent.

FIG. 3 shows a display example on the screen 1 according to the presentinvention in a second embodiment. A menu item selected on the screen 1shown in FIG. 2 may be, for instance, the one for brightness valuesetting. This value setting menu item is illustrated in FIG. 3. In themenu item 34, an indicator 36 is shown for visual indication that slidesto the right or left in accordance with an increase or decrease in a setvalue 35. This indicator 36 slides in an incremental or decrementaldirection in parallel with a horizontal movement of the pointing device20 made by the operator. Specifically, when the operator moves thepointing device 20 horizontally, the angular velocity detecting means 22samples relative position information for two points between which thepointing device was moved per given period of time from the horizontalangular velocity and detects the relative positions of the two points,and the data transmitting means 23 transmits the relative positioninformation to the data receiving means 31 of the image display device30. Then, the system microcomputer 33 of the image display device 30that received the relative position information calculates the distanceof the move by integration of that information. Then, the amount ofincrement or decrement of the indicator 36 is determined in accordancewith the number of cycles of sampling during which the move distance ofthe pointing device obtained for every sampling cycle exceeds apredetermined value continuously.

For example, in a state where a value of 4820 is initially set on thescreen 1 shown in FIG. 3, when the pointing device 20 is movedhorizontally in an increment direction, the system microcomputer 33 ofthe image display device is furnished with the relative positioninformation sampled at intervals of 10 msec. If the horizontal movedistance of the pointing device exceeds a fixed value for fivesuccessive cycles of sampling, the amount of increment is determined tobe 50 and the indicator slides to a position corresponding to 4870. Ifthis continues for further five successive cycles of sampling (a totalof 10 cycles), the amount of increment is determined to be 100 and theindicator slides to a position corresponding to 4920. If this continuesfor further five successive cycles of sampling (a total of 15 cycles),the amount of increment is determined to be 150 and the indicator slidesto a position corresponding to 4970. If this continues for further fivesuccessive cycles of sampling (a total of 20 cycles), the amount ofincrement is determined to be 200 and the indicator slides to a positioncorresponding to 5020. In this example as well, a position to which theindicator should slide is determined in proportion to time during whichthe pointing device continues to be moved, not subject to the entiredistance over which the pointing device 20 was moved. Thus, the operatoris allowed to move the pointing device slowly, taking longer, in orderto change the set value in a large amount of increment or decrement. Inconsequence, the operator does not need to move the pointing device 20to a large extent.

FIG. 4 shows a display example on the screen 1 according to the presentinvention in a third embodiment. The operator may want to pan an imagedisplayed on the screen 1. For example, if panning from the upper partof a full-length figure of a person displayed to its lower part image isperformed, after the screen is set enabled for panning, as the operatormoves the pointing device 20 vertically, the screen 1 is relativelyscrolled downward. This results in the effect of moving the imageupward. Specifically, when the operator moves the pointing device 20vertically, the angular velocity detecting means 22 samples relativeposition information for two points between which the pointing devicewas moved per given period of time from the angular velocity and detectsthe relative positions of the two points, and the data transmittingmeans 23 transmits the relative position information to the datareceiving means 31 of the image display device 30. Then, the systemmicrocomputer 33 of the image display device 30 that received therelative position information calculates the distance of the move byintegration of that information. Then, the image is panned by a distancein accordance with the number of cycles of sampling during which themove distance of the pointing device obtained for every sampling cycleexceeds a predetermined value continuously.

For example, in a state where the upper part of the full image of aperson is displayed on the screen 1 shown in FIG. 4, when the pointingdevice 20 is moved vertically, the system microcomputer 33 of the imagedisplay device is furnished with the relative position informationsampled at intervals of 10 msec. If the vertical move distance of thepointing device exceeds a fixed value for five successive cycles ofsampling, the image is moved by a distance corresponding to 20% of thescreen height. If this continues for further five successive cycles ofsampling (a total of 10 cycles), the image is moved by a distancecorresponding to 40% of the screen height. If this continues for furtherfive successive cycles of sampling (a total of 15 cycles), the image ismoved by a distance corresponding to 60% of the screen height. If thiscontinues for further five successive cycles of sampling (a total of 20cycles), the image is moved by a distance corresponding to 80% of thescreen height. The image is thus moved and its lower part is graduallydisplayed on the screen. In this example as well, a distance by whichthe image should be moved is determined in proportion to time duringwhich the pointing device continues to be moved, not subject to theentire distance over which the pointing device 20 was moved. Thus, theoperator is allowed to move the pointing device slowly, taking longer,in order to pan an image by a great distance. In consequence, theoperator does not need to move the pointing device 20 to a large extent.

FIG. 5 shows a display example on the screen 1 according to the presentinvention in a fourth embodiment. On the screen 1, sub-screens 42 may bedisplayed in a displayed image through the use of a picture-in-picturefunction. The display device can be equipped with functions of graduallyenlarging a sub-screen 42 in the screen 1, enlarging it to a full-screendisplay, and moving it across the screen 1, and the operator can performthese functions by moving a cursor 41 into an objective sub-screen 42and operating a specific button and the pointing device 20.

As a concrete method of moving the cursor 41 into a sub-screen 42, whenthe operator moves the pointing device 20 to move the cursor 41, theangular velocity detecting means 22 samples relative positioninformation for two points between which the pointing device was movedper given period of time from the horizontal and vertical angularvelocities and detects the relative positions of the two points, and thedata transmitting means 23 transmits the relative position informationto the data receiving means 31 of the image display device 30. Then, thesystem microcomputer 33 of the image display device 30 that received therelative position information calculates the distance of the move byintegration of that information. Then, a position to which the cursor 41should be moved is determined in accordance with the number of cycles ofsampling during which the move distance of the pointing device obtainedfor every sampling cycle exceeds a predetermined value continuously.

An example of operation of moving the cursor 41 into a sub-screen 42 isdescribed, assuming that the display device has the function ofenlarging the sub-screen 42 to a full-screen display at once on thescreen 1.

In a state where the cursor 41 is positioned at top left on the screen 1shown in FIG. 5, when the pointing device 20 is moved horizontally, thesystem microcomputer 33 of the image display device is furnished withthe relative position information sampled at intervals of 10 msec. Ifthe horizontal move distance of the pointing device exceeds a fixedvalue for five successive cycles of sampling, the cursor is moved by adistance corresponding to 20% of the screen width. If this continues forfurther five successive cycles of sampling (a total of 10 cycles), thecursor is moved by a distance corresponding to 40% of the screen width.If this continues for further five successive cycles of sampling (atotal of 15 cycles), the cursor is moved by a distance corresponding to60% of the screen width. If this continues for further five successivecycles of sampling (a total of 20 cycles), the cursor is moved by adistance corresponding to 80% of the screen width. After the cursor isthus moved up to a position within a top right sub-screen 42, bypressing an instantly zoom-in button 21 a, the sub-screen 42 is enlargedto a full-screen display on the screen 1. In this example as well, adistance by which the cursor 41 should be moved is determined inproportion to time during which the pointing device continues to bemoved, not subject to the entire distance over which the pointing device20 was moved. Thus, the operator is allowed to move the pointing deviceslowly, taking longer, in order to move the cursor by a large distance.In consequence, the operator does not need to move the pointing device20 to a large extent.

Next, an example of operation of moving a sub-screen 42 across thescreen is described.

In the state where the cursor 41 is positioned at top left on the screen1 shown in FIG. 5, the cursor 41 is moved into the objective sub-screen42 in the same way of operation as described above. After the cursor 41has been moved into the sub-screen 42, when the pointing device 20 ismoved horizontally, while a move button 2 is pressed, the systemmicrocomputer 33 of the image display device is furnished with therelative position information sampled at intervals of 10 msec. If thehorizontal move distance of the pointing device exceeds a fixed valuefor five successive cycles of sampling, the sub-screen 42 is moved by adistance corresponding to 20% of the screen width. If this continues forfurther five successive cycles of sampling (a total of 10 cycles), thesub-screen 42 is moved by a distance corresponding to 40% of the screenwidth. If this continues for further five successive cycles of sampling(a total of 15 cycles), the sub-screen 42 is moved by a distancecorresponding to 60% of the screen width. If this continues for furtherfive successive cycles of sampling (a total of 20 cycles), thesub-screen 42 is moved by a distance corresponding to 80% of the screenwidth. In this example as well, a distance by which the sub-screen 42should be moved is determined in proportion to time during which thepointing device continues to be moved, not subject to the entiredistance over which the pointing device 20 was moved. Thus, the operatoris allowed to move the pointing device slowly, taking longer, in orderto move the sub-screen by a large distance. In consequence, the operatordoes not need to move the pointing device 20 to a large extent.

FIG. 6 shows a display example on the screen 1 according to the presentinvention in a fifth embodiment. In a menu item 50, an indicator 52 isshown for visual indication that slides to the right or left inaccordance with an increase or decrease in a set value 51. Thisindicator 52 slides in an incremental or decremental direction inparallel with a horizontal movement of the pointing device 20 made bythe operator. Specifically, when the operator moves the pointing device20 horizontally, the angular velocity detecting means 22 samplesrelative position information for two points between which the pointingdevice was moved per given period of time from the horizontal angularvelocity and detects the relative positions of the two points, and thedata transmitting means 23 transmits the relative position informationto the data receiving means 31 of the image display device 30. Then, thesystem microcomputer 33 of the image display device 30 that received therelative position information calculates the distance of the move byintegration of that information. Then, the rate of increment ordecrement of the indicator 27 is changed in accordance with the numberof cycles of sampling during which the move distance of the pointingdevice obtained for every sampling cycle exceeds a predetermined valuecontinuously.

For example, in a state where a brightness value of 4820 is initiallyset on the screen 1 shown in FIG. 6, when the pointing device 20 ismoved horizontally in an increment direction, the system microcomputer33 of the image display device is furnished with the relative positioninformation sampled at intervals of 10 msec. If the horizontal movedistance of the pointing device exceeds a fixed value for fivesuccessive cycles of sampling, the rate at which the value increases ischanged to 50/sec. If this continues for further five successive cyclesof sampling (a total of 10 cycles), the rate at which the valueincreases is changed to 100/sec. If this continues for further fivesuccessive cycles of sampling (a total of 15 cycles), the rate at whichthe value increases is changed to 150/sec. If this continues for furtherfive successive cycles of sampling (a total of 20 cycles), the rate atwhich the value increases is changed to 200/sec. This relationshipbetween time and the rate at which the value increases is shown in agraph of FIG. 3. In this way, the rate at which the value increases andthe indicator slides accordingly is determined in proportion to timeduring which the pointing device continues to be moved, not subject tothe entire distance over which the pointing device 20 was moved. Thus,the rate at which the value increases is changed so that it will beaccelerated over time. That is, the operator is allowed to move thepointing device slowly, taking longer, in order to change the set valuegreatly. In consequence, the operator does not need to move the pointingdevice 20 to a large extent.

FIG. 8 shows a display example on the screen 1 according to the presentinvention in sixth and seventh embodiments. On the screen, a pointer 53may be shown to point to a particular portion of an image displayed. Thepointer 53 is moved by moving the pointing device 20. In particular, amovement of this pointer 53 pointing to an image A to an image B iscarried out by moving the pointing device 20 horizontally. Specifically,when the pointing device 20 is moved, the angular velocity detectingmeans 22 samples relative position information for two points betweenwhich the pointing device was moved per given period of time from thehorizontal angular velocity and detects the relative positions of thetwo points, and the data transmitting means 23 transmits the relativeposition information to the data receiving means 31 of the image displaydevice 30. Then, the system microcomputer 33 of the image display device30 that received the relative position information calculates thedistance of the move by integration of that information. Then, the speedat which the pointer 53 moves is accelerated in accordance with thenumber of cycles of sampling during which the move distance of thepointing device obtained for every sampling cycle exceeds apredetermined value continuously.

For example, in a state where the pointer 53 is positioned in the imageA at top left on the screen 1 shown in FIG. 8, when the pointing device20 is moved to the right horizontally, the system microcomputer 33 ofthe image display device is furnished with angular velocity valuessampled at intervals of 10 msec. If the horizontal move distance of thepointing device exceeds a fixed value for five successive cycles ofsampling, the pointer moves at a rate of 20% of the screen width persecond. If this continues for further five successive cycles of sampling(a total of 10 cycles), the pointer moves at a rate of 40% of the screenwidth per second. If this continues for further five successive cyclesof sampling (a total of 15 cycles), the pointer moves at a rate of 60%of the screen width per second. This relationship between time and therate is shown in a graph of FIG. 9. In this example as well, the rate atwhich the pointer moves is determined in proportion to time during whichthe pointing device continues to be moved, not subject to the entiredistance over which the pointing device 20 was moved. Thus, the pointermoves at an accelerating rate over time. That is, the operator isallowed to move the pointing device slowly, taking longer, in order tomove the pointer greatly. In consequence, the operator does not need tomove the pointing device 20 to a large extent.

A practical display apparatus for presentation can be configured incombinations of the above first to seventh embodiments of the presentinvention. In this relation, it is preferable to vary the sensitivity ofmove distance calculation for every sampling cycle from relativeposition information, according to application. For improved usability,for instance, it is advisable to apply the normal sensitivity forselecting a menu item, adjusting the value in a menu item, andpicture-in-picture operation, a two-fold sensitivity for moving thepointer, and a three-fold sensitivity for panning.

INDUSTRIAL APPLICABILITY

According to the present invention as described hereinbefore, byprovision of means for determining a menu item to which the selectionmarker should be moved in accordance with the number of cycles ofsampling during which the move distance of the pointing device obtainedfor every sampling cycle from angular velocity information exceeds apredetermined value continuously, moving to a desired menu item can beperformed by continuing to move the pointing device for a given time orlonger and usability is enhanced.

Also, by provision of means for determining the amount of increment ordecrement of an indicator for value setting in accordance with thenumber of cycles of sampling during which the move distance of thepointing device obtained for every sampling cycle from angular velocityinformation exceeds a predetermined value continuously, it becomes easyto change the setting to a desired value by continuing to tilt thepointing device for a given time or longer and usability is enhanced.

Also, by provision of means for panning by a distance in accordance withthe number of cycles of sampling during which the move distance of thepointing device obtained for every sampling cycle from angular velocityinformation exceeds a predetermined value continuously, panning to adesired image portion can be performed by continuing to tilt thepointing device for a given time or longer and usability is enhanced.

Also, by provision of means for moving to a sub-screen by a distance inaccordance with the number of cycles of sampling during which the movedistance of the pointing device obtained for every sampling cycle fromangular velocity information exceeds a predetermined value continuously,picture-in-picture moving to a desired sub-screen can be performed bycontinuing to tilt the pointing device for a given time or longer andusability is enhanced.

Also, the rate of increment or decrement of an indicator for valuesetting can be changed in accordance with the number of cycles ofsampling during which the move distance of the pointing device obtainedfor every sampling cycle from angular velocity information exceeds apredetermined value continuously; thereby, it becomes easy to change thesetting to a desired value by continuing to tilt the pointing device fora given time or longer and usability is enhanced.

Furthermore, the rate at which the pointer moves can be changed inaccordance with the number of cycles of sampling during which the movedistance of the pointing device obtained for every sampling cycle fromangular velocity information exceeds a predetermined value continuously;thereby, moving to a desired position can be performed by continuing totilt the pointing device for a given time or longer and usability isenhanced.

1. A display apparatus for presentation comprising a pointing deviceequipped with means for detecting angular velocities in horizontal andvertical directions and means for transmitting detected angular velocityinformation and an image display device having means for receivingangular velocity information transmitted from the pointing device andequipped with a function of moving a selection marker across a pluralityof menu items arranged in vertical and horizontal directions anddisplayed on a screen in accordance with the received angular velocityinformation, the display apparatus for presentation characterized byprovision of means for determining a menu item to which the selectionmarker should be moved in accordance with the duration of sampling theangular velocities during which the move distance of the pointing deviceobtained for every sampling cycle from said angular velocity informationexceeds a predetermined value continuously.
 2. A display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with afunction of presenting an indicator for value setting in a menu itemdisplayed on a screen and making the indicator slide in a valueincremental or decremental direction in accordance with the receivedangular velocity information, the display apparatus for presentationcharacterized by provision of means for determining the amount ofincrement or decrement of the indicator for value setting in accordancewith the duration of sampling the angular velocities during which themove distance of the pointing device obtained for every sampling cyclefrom said angular velocity information exceeds a predetermined valuecontinuously.
 3. A display apparatus for presentation comprising apointing device equipped with means for detecting angular velocities inhorizontal and vertical directions and means for transmitting detectedangular velocity information and an image display device having meansfor receiving angular velocity information transmitted from the pointingdevice and equipped with a panning function of moving an image displayedon a screen in accordance with the received angular velocityinformation, the display apparatus for presentation characterized byprovision of means for panning by a distance in accordance with theduration of sampling the angular velocities during which the movedistance of the pointing device obtained for every sampling cycle fromsaid angular velocity information exceeds a predetermined valuecontinuously.
 4. A display apparatus for presentation comprising apointing device equipped with means for detecting angular velocities inhorizontal and vertical directions and means for transmitting detectedangular velocity information and an image display device having meansfor receiving angular velocity information transmitted from the pointingdevice and equipped with a picture-in-picture function to move orenlarge a sub-screen displayed on a screen in accordance with thereceived angular velocity information, the display apparatus forpresentation characterized by moving or enlarging the sub-screen by adistance in accordance with the duration of sampling the angularvelocities during which the move distance of the pointing deviceobtained for every sampling cycle from said angular velocity informationexceeds a predetermined value continuously.
 5. A display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with afunction of presenting an indicator for value setting in a menu itemdisplayed on a screen and making the indicator slide in a valueincremental or decremental direction in accordance with the receivedangular velocity information, the display apparatus for presentationcharacterized by provision of means for changing the rate of incrementor decrement of the indicator for value setting in accordance with theduration of sampling the angular velocities during which the movedistance of the pointing device obtained for every sampling cycle fromsaid angular velocity information exceeds a predetermined valuecontinuously.
 6. A display apparatus for presentation comprising apointing device equipped with means for detecting angular velocities inhorizontal and vertical directions and means for transmitting detectedangular velocity information and an image display device having meansfor receiving angular velocity information transmitted from the pointingdevice and equipped with a function of moving a cursor or pointerdisplayed on a screen in accordance with the received angular velocityinformation, the display apparatus for presentation characterized byprovision of means for moving the cursor or pointer by a distance inaccordance with the duration of sampling the angular velocities duringwhich the move distance of the pointing device obtained for everysampling cycle from said angular velocity information exceeds apredetermined value continuously.
 7. A display apparatus forpresentation comprising a pointing device equipped with means fordetecting angular velocities in horizontal and vertical directions andmeans for transmitting detected angular velocity information and animage display device having means for receiving angular velocityinformation transmitted from the pointing device and equipped with afunction of moving a pointer displayed on a screen in accordance withthe received angular velocity information, the display apparatus forpresentation characterized by provision of means for changing the rateat which the pointer moves in accordance with the duration of samplingthe angular velocities during which the move distance of the pointingdevice obtained for every sampling cycle from said angular velocityinformation exceeds a predetermined value continuously.
 8. A displaysystem comprising a display device and a pointing device associated withthe display device and for use to operate upon an object to changedisplayed on a display screen by said display device, the display systemcharacterized by including: a position information detecting means fordetecting position information on positions indicated by said pointingdevice; a move information sampling means for sampling the move distancebetween said indicated positions per unit time, based on the positioninformation detected by the position information detecting means; and achange amount determining means for determining the amount of change ofsaid object to change on said display screen, based on the duration ofsampling during which the move distance between said indicated positionsper unit time, sampled by the move information sampling means, exceeds athreshold continuously.
 9. A pointing device associated with a displaydevice and for use to operate upon an object to change displayed on adisplay screen by the display device, the pointing device characterizedby including a position information detecting means for detectingposition information on positions indicated by the pointing device,wherein, based on the position information, the position informationdetecting means samples the move distance between said indicatedpositions per unit time and determines the amount of change of saidobject to change on said display screen, based on the duration ofsampling during which the sampled move distance between said indicatedpositions per unit time exceeds a threshold continuously.
 10. A displaydevice associated with a pointing device for use to operate upon anobject to change on a display screen, the display device characterizedby including a change amount determining means, wherein, based onposition information on positions indicated by said pointing device, thechange amount determining means samples the move distance between saidindicated positions per unit time and determines the amount of change ofsaid object to change on said display screen, based on the duration ofsampling during which the sampled move distance between said indicatedpositions per unit time exceeds a threshold continuously.
 11. A displaysystem comprising a display device and a pointing device associated withthe display device and for use to operate upon an object to changedisplayed on a display screen by said display device, the display systemcharacterized by including: an angular velocity detecting means fordetecting angular velocity information on positions indicated by saidpointing device; a move information sampling means for sampling the movedistance between said indicated positions per unit time, based on theangular velocity information detected by the angular velocity detectingmeans; and a change amount determining means for determining the amountof change of said object to change on said display screen, based on theduration of sampling during which the move distance between saidindicated positions per unit time, sampled by the move informationsampling means, exceeds a threshold continuously.
 12. A display systemcomprising a display device and a pointing device associated with thedisplay device and for use to move a pointer position pointing on adisplay screen displayed by said display device, the display systemcharacterized by including: a position information detecting means fordetecting position information on positions indicated by said pointingdevice; a move information sampling means for sampling the move distancebetween said indicated positions per unit time, based on the positioninformation detected by the position information detecting means; and amove distance determining means for determining a distance by which saidpointer position should be moved, based on the duration of samplingduring which the move distance between said indicated positions per unitof time, sampled by the move information sampling means, exceeds athreshold continuously.